1. A person sits beside a highway when a car traveling toward the observer at 35. 0 m/s blows its horn with a frequency of 320 Hz. What frequency of sound does the observer hear when (a) the car is approaching? (b) the car is right next to him? (c) the car is moving away?

Options A, B & D are true.

We are dealing with the concept of inertia.

This means that inertia is the force that keeps an object at rest or in constant motion.

Read more at; brainly.com/question/13656225

Answer:

force of gravity; weight

Explanation:

Weight is the force of gravity on an object and it is measured in Newtons. On this spring scale, each line equals one Newton.

Answer:

Explanation:

The formula for kinetic energy  Ke=1/2mv^2 where Ke is kinetic energy, m=mass, and v= velocity.

If the kinetic energy is increased that means that there must be an increase in mass or velocity. However, since the velocity is squared that means that velocity affects the kinetic energy of the object more than the mass does.

✔ First step : calculate the kinetic energy that this car requires to reach 95 km/h

95/ 3,6 ≈ 26,4 m/s  

Ec = ½ m x V²  

With Ec in J; m in kg; and V in m/s  

✔ Knowing that the car has a p power of 215,000 W, so :

T = E/P  

N = 2,8/6,5 x 100 = 43.07

Answer:

Explanation:

Part A

Resistances in Series Add

Rt = R1 + R2

Rt = 33 + 22

Rt = 55 ohms

Part B

Current is found by using ohms law

I = E/R

E = 120 volts

R = 55 ohms

I = 120/55

I = 2.18

Part C

E = I * R

E = ?

I = 2.18

R = 22 ohms

E = I * R

E = 2.18 * 22

E = 48 volts when I is not rounded in Part B

E = I * R

E = ?

I = 2.1818...

R = 33

E = 2.181818... * 33

E = 72 when the repeating decimal is allowed to repeat.

Part D

The total voltage drop across both resistors adds

E = 72 + 48

E = 120 Volts

Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

Answer:

B

Explanation:

This is the correct answer because given that this is a closed system, this means that energy is not lost but only changes form. The fact that the ball bounces shorter each time shows that energy is being transformed and not lost. Because of this, the ball must be transforming kinetic energy into sound which is why B is correct

Answer: The answer is B

Explanation: Im just built different

Answer:

Explanation:

In physics, work can be described as force multiplied by the displacement of the object (distance caused by the force acted on the object).

Work is a form of energy, therefore, it is measured in joules.

If Alex pushed on an object with 10N of force, and the object moved 2 meters, the work of Alex will be equal to:

W = Ft

W = 10N * 2m

W = 20 Joules

But, if we have John, that pushed on an object with 2N of force, but, since the object was way smaller, therefore it had way less inertia, the object moved a distance equal to 10 meters. Let's also calculate his work.

W = Ft

W = 2N * 10m

W = 20 Joules

And we got the same result.

Work can also be used to calculate power.

Power is equal to P = Work / time

It can also be written as P = delta Work / delta time

Power is measured in joules per second.

With power you can make the difference between someone that got a 2 kg object up in 2 second, and someone that got a 2 kg object up in 5 second.

The more powerful one would be the one who managed to make the same work in less time.

Hope it Helped!

Work is described as: the measure of energy transfer resulting from the application of force over a displacement.

In the field of physics, work is most accurately defined as the outcome of multiplying the force exerted on an object by the distance the object is displaced in the same direction as the force.

This calculation serves to quantify the energy transferred to or from the object. For instance, if an individual applies a 50 Newton force to push a box across a 5-meter distance in the force's direction, the work done on the box would equal 250 Joules (50 N × 5 m).

Learn more about Work on:

https://brainly.com/question/14813637

#SPJ6

A. The average drift speed of the electrons in the wire is  1.19 x \(10^{-3}\)cm/s.

B. The time it would take an electron to travel 8.84 m is 7.43 x \(10^{5}\)sec

(A) To find the average drift speed of electrons in a wire, we can use the equation:

I = nAvq

Where:
I is the current in Amperes
n is the electron density in electrons per \(cm^{3}\)
A is the cross-sectional area of the wire in \(cm^{2}\)
v is the average drift velocity of electrons in cm/s
q is the charge of an electron, which is 1.6 x \(10^{-19}\) Coulombs

First, we need to find the cross-sectional area of the wire. The formula for the area of a circle is:

A = π\(r^{2}\)

Where:
A is the area of the circle
r is the radius of the circle

Given that the wire diameter is 1.63 mm, we can find the radius by dividing it by 2:

r = 1.63 mm / 2 = 0.815 mm = 0.0815 cm

Now, we can calculate the area:

A = \(π(0.0815 cm)^{2}\) = 0.0209 \(cm^{2}\)

Next, we can rearrange the equation to solve for v:

v = I / (nAq)

Given that the current is 20 A and the electron density is 8.47 x \(10^{24}\)electrons per \(cm^{3}\), we can substitute these values into the equation:

v = 20 A / (8.47 x \(10^{24}\) electrons per cm^3 * 0.0209 cm^2 * 1.6 x \(10^{-19}\) C)

Simplifying the expression:

v = 1.19 x \(10^{-3}\) cm/s

Therefore, the average drift speed of electrons in the 14 gauge wire carrying a maximum current of 20 A is approximately 1.19 x \(10^{-3}\) cm/s.

(B) To calculate the time it would take for an electron to travel a distance of 8.84 m, we can use the formula:

t = d / v

Where:
t is the time in seconds
d is the distance in meters
v is the average drift velocity of electrons in meters per second

Given that the distance is 8.84 m and the average drift velocity is 1.19 x 10^-3 cm/s, we need to convert the velocity to meters per second:

v = 1.19 x \(10^{-3}\) cm/s * 0.01 m/cm = 1.19 x \(10^{-5}\) m/s

Now, we can substitute the values into the formula:

t = 8.84 m / 1.19 x \(10^{-5}\)m/s

Simplifying the expression:

t = 7.43 x \(10^{5}\)s

Therefore, it would take approximately 7.43 x \(10^{5}\) seconds for an electron to travel a distance of 8.84 m.

Know more about distance here:

https://brainly.com/question/26550516

#SPJ8

another answer for acellus is 143 m/s it worked for me

The speed of the charge is approximately 2.857 m/s.

To find the speed of the charge, we can use the formula for the magnetic force on a charged particle moving through a magnetic field:

Force (F) = q * v * B * sin(θ)

Where:

F is the force on the charge (given as 2.14 x \(10^-8\)  N),

q is the charge of the particle (given as 2.99  x \(10^-6\)C),

v is the speed of the charge (what we want to find),

B is the magnitude of the magnetic field (given as 5.00 x \(10^-5\) T),

θ is the angle between the direction of motion and the magnetic field (given as 10.0°).

First, we need to convert the angle from degrees to radians:

θ (in radians) = 10.0° * (π / 180°) ≈ 0.174532925 radians

Now, we can rearrange the formula to solve for the speed (v):

v = F / (q * B * sin(θ))

Substitute the given values into the equation:

v = 2.14 x \(10^-8\) N / (2.99 x \(10^-6\) C * 5.00  x \(10^-5\)  T * sin(0.174532925))

v ≈ 2.857143 m/s

Therefore, the speed of the charge is approximately 2.857 m/s.

To know more about speed here

https://brainly.com/question/17661499

#SPJ2

Answer:

well, hydropower is using fast-running water as a source of power to power machines or produce electricity, and using water can help make the earth a little cleaner, just like solar energy (energy from the sun). instead of using things like coal, oil, gas which is bad for the earth

Explanation:

Answer:

Sport lowers high blood pressure, Keeps cholesterol level right. Blood circulation in the body is relatively high during play, so nutrients can go to all parts of the body. Moreover, white blood cells increase during play that increases the body’s immunity power. That’s why sports is important in our life.

Explanation:

yes

The statement "Because elements/atoms cannot exist on their own" is not a reason why atoms tend to bond to other atoms.

An atom is the basic unit of matter that retains the chemical properties of an element. It is composed of a nucleus containing positively charged protons and uncharged neutrons, with negatively charged electrons orbiting the nucleus in shells or energy levels. The number of protons in an atom's nucleus determines its atomic number, which defines the element to which it belongs.

some elements/atoms can exist on their own in stable forms, such as the noble gases, which have complete outer electron shells and are therefore unreactive with other elements.

Learn about atoms here https://brainly.com/question/17545314

#SPJ1

The value of theta for the maximum height is 30°.

Calculation:-

Since the angle from the horizontal is Cosθ, therefore the angle from the vertical is sinθ.

Hmax = U² sin²θ/2g

11.25 = 30² sin²θ/2g

sin²θ = (11.25 × 2 × 10)/900

   ⇒    sin²θ   =   0.25

    ⇒   sin θ = 0.5

    ⇒   sin θ = 1/2 = 30°

The horizontal pace of a projectile is regular (in no way converting in value), and there's a vertical acceleration because of gravity; its cost is 9.8 m/s/s, down, The vertical speed of a projectile changes via nine.8 m/s every second, The horizontal motion of a projectile is impartial of its vertical movement.

Projectile motion is a form of motion experienced with the aid of an object or particle that is projected in a gravitational field, such as from Earth's floor, and movements alongside a curved route below the action of gravity best.

Projectile motion is the movement of an object thrown (projected) into the air. After the initial force that launches the item, it most effectively reports the pressure of gravity. The object is known as a projectile, and its route is called its trajectory.

Learn more about projectile motion here:-https://brainly.com/question/10680035

#SPJ9

Power tools must be used since all interior walls are reinforced is a consideration when forcing interior walls.

The correct option is  C.

The load of the floor or roof construction above them is supported by load-bearing walls, also referred to as "bearing walls." They are made to transfer weight from the roof to the foundation by passing through the flooring. A bearing wall, also known as a load-bearing barrier or a structural wall, supports the entire weight of the home. This wall assists in distributing the weight of the building from the roof to the base, and its loss could lead to the building collapsing.

Tom proposes going up to the attic or basement to check which direction the joists run to see if a wall is load-bearing. The wall is still most likely not load-bearing if it runs parallel to the joists.

To know more about Load-bearing visit:

https://brainly.com/question/11158855

#SPJ13

The complete question is -

What is a consideration when forcing interior walls?

A-The wall coverings often hide interior metal framing.

B-The walls may be load-bearing and affect structural integrity.

C-Power tools must be used since all interior walls are reinforced.

D-Forcing the wall will require firefighters to work in a team of two.

When preparing for the Physics ACT test, it is important to focus on the core concepts of physics such as kinematics, forces, energy, work, linear momentum, rotational motion, gravity and thermodynamics.

Kinematics is the branch of classical mechanics that studies the motion of objects without considering the forces that cause the motion. It is concerned only with the description of motion, and deals with the position, orientation, velocity, and acceleration of objects in motion.

Kinematics can be used to describe the motion of objects in a variety of ways, such as linear motion, angular motion, and dynamic motion. It is also used to calculate the trajectory of objects.

To learn more about  kinematics

https://brainly.com/question/26407594

#SPJ1

Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

For more questions on the cardiovascular system

https://brainly.com/question/16948738

#SPJ8

The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

12). When you move your hand or foot, your body has converted potential energy into kinetic energy.

13). When coasting while roller skating, you eventually stop due to

friction causes kinetic energy to transfer to thermal energy.

14).  A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is Kinetic increases, potential decreases.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all examples of objects in motion that use kinetic energy.

To know more about kinetic energy visit:

https://brainly.com/question/26472013

#SPJ1

The correct option is 2. The solid state is more dense than the liquid state.

The solid form of most substances is denser than the liquid phase so a block of most solids will sink in the liquid but a block of ice floats in liquid water because ice is less dense. Upon freezing the density of water decreases by about 9%. This is due to cooling of intermolecular vibrations allowing the molecules to form steady hydrogen bonds and locking into positions of hexagonal packing upon freezing to ice. These bonds are shorter in the crystal than in the liquid.

Learn more about densities of the phases of water here. https://brainly.com/question/12292208

#SPJ10

True. Most astronomers believe that the demise of the dinosaurs 65 million years ago was caused by a large asteroid impact in the Yucatan Peninsula area, based on extensive evidence from geology, palaeontology, and impact crater studies.

True. The majority of astronomers and scientists support the theory that the extinction event leading to the demise of the dinosaurs 65 million years ago was caused by a large asteroid impact in the Yucatan Peninsula area. Extensive evidence, including the discovery of the Chicxulub impact crater, supports this hypothesis. Geological studies reveal a layer of sediment rich in iridium, a rare element found in higher concentrations in asteroids. Additionally, the discovery of shocked quartz and tektites, along with the global distribution of the debris layer, further supports the impact theory. This widely accepted explanation combines astronomical, geological, and paleontological evidence to attribute the extinction event to a significant asteroid impact.

Learn more about astronomers here:

https://brainly.com/question/1764951

#SPJ11

Due to Friction, Air resistance and Weight of the ball the predicted force of tension different than the actual force of tension

The predicted force of tension is different than the actual force of tension because of various factors such as friction, air resistance, and the weight of the ball. When the experiment is conducted, these factors affect the motion of the ball, resulting in a difference between the predicted and actual force of tension. The force of tension is the force acting on an object that is attached to a string or rope, and it is directed towards the center of the circular path.

In the case of the vertical circle, the force of tension is the force that keeps the ball moving in a circular path. To determine the force of tension, the student uses the following equation:

Ft = mv2/r + mg

where, Ft = force of tension, m = mass of the ball, v = tangential speed of the ball, r = length of the string, g = acceleration due to gravity

When the student measures the actual force of tension using a force probe, the value obtained may be different from the predicted value due to the following factors:

1. Friction:- Friction is the force that opposes the motion of the ball. When the ball moves in a circular path, there is a force of friction acting on the ball. The force of friction depends on the type of surface and the mass of the ball.

2. Air resistance:- Air resistance is the force that opposes the motion of the ball due to the air. As the ball moves through the air, it experiences a force of air resistance. The force of air resistance depends on the size, shape, and speed of the ball.

3. Weight of the ball:- The weight of the ball is the force due to gravity acting on the ball. When the ball moves in a circular path, there is a force of weight acting on the ball. The force of weight depends on the mass of the ball and the acceleration due to gravity.

For more such questions on Friction , Visit:

https://brainly.com/question/24338873

#SPJ11

Answer:

This level of needs is known as safety needs. Safety needs are the need for security, stability, and protection from physical and emotional harm. These needs include physical safety, financial security, health and well-being, and protection from discrimination and harassment.

Explanation:

40 degrees Fahrenheit is equivalent to 4.4444444444444446 degrees Celsius.

The Celsius scale is a temperature scale that is used primarily in other parts of the world, while Fahrenheit is primarily used in the United States.

To convert from Fahrenheit to Celsius, you can use the following formula: (°F - 32) x 5/9 = °C

If one wants to know what temperature 40 degrees Fahrenheit is in Celsius, you would use the formula: (40-32)x5/9 = 8x 5/9 = 4.4444444444444446 degrees Celsius

Understanding the relationship between Fahrenheit and Celsius is important as it allows you to be able to easily convert between the two temperature scales.

To know more about temperature scales here:

https://brainly.com/question/29200594#

#SPJ11

Answer:

B. a piece of paper being torn

Explanation:

A chemical change is one that cannot be reversed. This means the original properties of the substance or object cannot be restored.

If you cook a raw egg, it would turn into a boiled egg (or a poached egg, however it is being cooked). The reaction is irreversible, so you cannot turn the cooked egg back into a raw egg - it is basically impossible to 'uncook' an already cooked egg.

When you toast a piece of bread, it turns into toast. You can't 'untoast' it back into bread. The chemical changes have already occurred and cannot be undone.

If you tear a piece of paper, it is still paper. You are only ripping it, not changing anything about it. You could simply tape the torn bit back to the original bit, or glue it - either way, it is still paper and nothing has occurred to drastically change the physical state of it.

Therefore, B is not a chemical change.

Answer:

Explanation:

The farther a celestial object (a mass in space) is from another, the less of a gravitational force that they have on each other.

Thermal energy is transfered from an objects thermal energy store if the surroundings have a lower temperature than the object.

Thermal energy is transferred from an object's thermal energy store to its surroundings if the surroundings have a lower temperature than the object. Heat flows spontaneously from a higher-temperature object to a lower-temperature object until they reach thermal equilibrium, meaning they have the same temperature.

This is the second law of thermodynamics. The direction of heat transfer is always from the object with higher temperature to the object with lower temperature, so that the heat energy flows in the direction that increases the entropy of the system.

To know more about Thermal energy here

https://brainly.com/question/30859008

#SPJ4

Answer:

It is Potassium and iodine

The minimum applied force that will keep the box at rest is 55 N.

The term frictional force refers to the force that opposes the motion of a body. We have the following information'

Given that;

μ = F/R

R = mgcosθ = 26.8 kg × 9.8 ms-2 × cos13 =255.9 N

F = μR

F =  0.215 × 255.9 N

F = 55 N

The minimum applied force that will keep the box at rest is 55 N.

Learn more about frictional force: https://brainly.com/question/1714663

Answer:

the answer is D metal resting

Explanation:

I just think that because if you treasure can that's physical charge by dropping where you create a physical charge melting and Ice Cube might be 1 but I feel like metal resting is more likely

Answer:

stopping distance = thinking distance + braking distance

Condition of the car : if the condition is bad it will increase the stopping distance as if the car brakes or tyres are in poor condition the braking distance will increase

Condition of the driver : if he is on drug or alcohol or he is tires or he has distractions then ( basically in bad condition ) . The stopping distance will increase as thinking  distance will increase .

Weather  : if it is snowing or there is bad weather conditions then stopping distance will increase as braking distance will increase

Road surface : bad conditions( broken or dust)  will increase braking distance   so therefore the stopping distance will increase